Created by Tomer Gal.

Problem

Let f, left parenthesis, x, right parenthesis, equals, log, start subscript, 3, end subscript, left parenthesis, x, minus, 4, x, start superscript, 2, end superscript, right parenthesis.
Find f, prime, left parenthesis, x, right parenthesis.
Please choose from one of the following options.